differentiation

i have to differentiate this using the quotient rule...and i tried to do it but ended up with something that really, really does not look right...i'm wondering if anyone can help please? i know i know how to do this but i dont seem to be able to for some reason!
thanks

i have to differentiate this using the quotient rule...and i tried to do it but ended up with something that really, really does not look right...i'm wondering if anyone can help please? i know i know how to do this but i dont seem to be able to for some reason!
thanks